Siemens LMV5 Series Technical Instructions page 232

Error Diag.
Device Display
Code Code
Any #
01
02
LMV5 /
Fault Flame
05 Flame
Detector Test
03
Dect.
10
Any #
01
Internal Fault
06 LMV5
02
Basic Unit
03
04
Fault with devices or wiring connected to the Base Unit (LMV5)
Any #
01
02
03
04
05
Devices
06
Internal Fault
10 conn. to
Basic Unit
07
LMV5
08
09
0A
0B
0C
0D
0E
0F
10
Section 7
Meaning for the LMV5x System
Fault with Flame scanner (QRI) or Base Unit (LMV5)
Fault during test of the flame signal amplifier
Fault during test of the flame signal amplifier
Crosstalk fault between test pin and flame signal amplifier
channel (with LMV52 FSV channel QRI... / QRB...)
Crosstalk fault between test pin and FSV channel ION (LMV52
only)
Monitoring of redundancy contact on external high-temperature
or flame safegaurd
Fault with Base Unit (LMV5)
Fault internal hardware tests
Fault during test of the ignition relay
Fault during test of the safety relay
Fault during voltage supervision test
Relay voltage not switched off after reset
Basic unit has detected an improper circuit at one of the
outputs, a faulty diode, or a short-circuit in the power supply of
the contact feedback network. The diagnostic code indicates
the input affected.
Load controller on / off
Fan contact
Selection of oil-firing
Selection of gas-firing
Reset
Pressure switch oil maximum
Pressure switch oil minimum
Pressure switch valve proving
Safety valve oil feedback
Fuel valve 1 oil feedback
Fuel valve 2 oil feedback
Fuel valve 3 oil feedback
Safety valve gas feedback
Fuel valve 1 gas feedback
Fuel valve 2 gas feedback
Pilot valve gas feedback
Page 24
If fault occurs sporadically: Improve shielding / isolation
of flame detector wires. High LMV5 temperatures can
also cause this fault. If fault occurs constantly: Lower
LMV5 temperature, replace flame detector, or replace
LMV5.
Check the wiring and the parameters of the external
safety limit thermostat / external flame safeguard
including the redundancy contact.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
1) Check connections of the neutrals to all of the
connected switches, valves, etc...
2) Check for inductive loads that cause voltage to be
present on the terminal after the LMV de-energizes the
terminal. If voltage exists on an output terminal, such as
a fuel valve, after the LMV de-energizes the terminal,
this will cause a fault. Voltage must drop to zero on the
terminal within about 10 ms after the terminal is de-
energized.
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Corrective Action
SCC Inc.